How do you embed Ustream live broadcasts?

Okay, can someone please give me specific instructions for adding a Ustream live stream to my blog (preferably the sidebar)?
Isn't there a WordPress shortcode for Ustream? I think the format is [ ustream 123456789.usv]
If that is the correct format, could you tell me where I find that channel id number?
Thanks in advance.

It gave me a flash player box with nothing in it when I put it on a page. I just got the shortcode itself when I put it in the sidebar.
And shortcodes don't have to be put in the HTML editor, actually. For example, if you use the insert video button in a post and add a YouTube URL, it puts the shortcode right there in the visual editor.